Things I've tagged “scalability” (5 things)
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HipHop for PHP: six months later | Facebook (Friday August 13, 2010)
"...on average reduced our CPU usage here at Facebook by about 50%. Since February, the team has made HipHop another 1.8 times faster", also citing a 2.7x performance improvement on Wordpress.
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peeping into memcached (Tuesday April 21, 2009)
Peep uses ptrace to freeze a running memcached server, dump the internal key metadata, and return the server to a running state. The state can then be dumped in MySQL and examined for performance and usage analysis.
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Scarling » Kestrel (Thursday February 26, 2009)
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Super-sising YouTube with Python (Saturday April 12, 2008)
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Consistent Hashing (Friday March 28, 2008)